/in/foo.c: In function 'Output':
/in/foo.c:5:10: warning: zero-length gnu_printf format string [-Wformat-zero-length]
   printf("");
          ^~
/in/foo.c: In function 'FindMan':
/in/foo.c:16:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'FindMaxIndex':
/in/foo.c:27:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^